James Bottomley wrote:> To take the model I understand: SAS; the links are managed at the phy> level, so the power policy should be set there and thus should probably> be a property of the phy object, which doesn't even exist in the SCSI> model, it only exists in the transport class. It strikes me that even> for ATA, the same thing is probably true.> > Now, I can see that the power management models of all the transports> might share some similarities (particularly at this three stage granular> level); if so, it might make sense to export helpers from the mid-layer> for the transport classes to use for this.